Bad fuel in a Mini Cooper Works? Diesel in your Petrol Mini?

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Mini Fuel Drain


Filling Diesel in a Petrol Mini is a well-known error. And its solution is determined by a few things. If perhaps you want to know what you need to do about this then stay with me.
These are the key variables to consider when figuring out whether to have the car drained:

  1. What level of Diesel have you put into the Mini, bearing in mind that the fuel tank capacity of the Mini Cooper Works is in most cases roughly 50 litres?
    1. A small quantity of Diesel, less than 2.5 litres of Diesel in a Petrol Cooper Works will quite often not necessarily be a major problem. Experience has demonstrated to us that anything under 2.5 litres (approximately 5% of the overall fuel tank volume) is oftentimes capable of being sufficiently diluted simply by entirely filling up the tank with Petrol.
      It's relatively uncommon to encounter an automobile going through issues with under 5% wrong fuel contamination. Keep in mind that it is very unusual - not impossible to find. You will discover certain vehicles that don't endure any quantity of contamination whatsoever.
    2. Somewhere between 2.5 and 5 litres of Diesel in the Mini (from 5 to 10%) is more of a 50/50 scenario. Our practical experience has shown us that as many drivers get away with it as those who break down. When deciding on whether or not to risk it and just top it up consider that it is very much like betting everything on black - you've got a 50/50 possibility of it working.
    3. Anything in excess of 5 litres of Diesel in a Petrol Cooper Works should really immediately be drained out as your probability of driving with that quantity of contamination is probably below one in 50 - really big odds.
  2. Put some Diesel in a Petrol Mini and drove it: Have you noticed any performance concerns ever since putting the wrong fuel in your Cooper Works? If so, get it emptied regardless of the volume of Diesel or even the contamination ratio. Continuing to run running a motor vehicle that is starting to suffer from the effect of fuel contamination can just cause even more damage affecting your fuel system parts.
  3. Do you want reassurance?
    In that case get it emptied. Regardless of the contamination percentage, there is invariably some degree of threat in connection with driving a Petrol engine on fuel contaminated with Diesel. Likely outcomes of driving on the incorrect fuel normally include the motor refusing to start, running lumpy, lack of power, degradation of the high-pressure pump, damaged or blocked injectors, etc. These are several of the most typical Diesel in Petrol warning signs, and in the event that you observe any of them then cease driving and have it removed asap.

Refrain from getting any jack-of-all-trades to try to fix your automobile. We are Mini specialists and have got the credentials and knowledge needed to ensure that you get back on the road with minimal hassle or worry.

Put Diesel in a Petrol Mini

Mistakenly put Diesel in a Petrol Mini? Or perhaps even put contaminated fuel in your Mini Cooper Works?

Contact us for Assistance & Guidance

Contact us and obtain straightforward recommendations and sensible assistance for your specific situation

We come out and do the fuel drain

We are able to reach you to undertake the full fuel removal & flush there on scene

Once performed You Get Moving Again

As soon as we have completed you should be able to get back on the road and get on with your day

Wrong Fuel Drain Specialists

We are the leading wrong fuel drain professionals in the UK, boasting national coverage, for Mini motorists particularly. We principally deal with:

  • Unleaded petrol in Diesel Auto
  • Diesel in an Unleaded Petrol Vehicle
  • AdBlue fuel contamination
  • Water fuel contamination

We are Mini specialists and have successfully drained hundreds of Petrol Mini vehicles. Whether it's roadside, on a petrol station forecourt, or even at home, we can get you going again.

The Process

The system of getting rid of Diesel from a Petrol vehicle is generally identical for virtually all vehicle makes. Naturally it does vary a bit as every manufacturer has their own distinct fuel system. Having said that it still follows the below principles:

Petrol in Diesel Mini

Fuel Drain

Empty the Fuel Tank

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Wrong Fuel Drain Mini

System Flush

Clean out the fuel lines & pumps

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Petrol in Diesel Drain Mini

Vehicle Restart

Get the car up and running again

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Diesel in Petrol FAQs

When someone has put Diesel in a Petrol car they have a few very common questions. So we have compiled a list of the most Frequently Asked Questions for you

I put Diesel in a Petrol car and drove it. What do I do?


Turn off the car as soon as possible and call us. Continuing to run a vehicle on the wrong fuel can potentially damage it. We will be able to give you advice and assistance based on your circumstances

Will driving a Petrol car on Diesel cause damage to it?


It can. However, if the problem is caught and remedied quickly the risks will be minimal. Of the 1,500 vehicles we attend every month, less than 0.5% have suffered and substantial damage requiring parts replacement.

How much Diesel can I get away with in a Petrol car?


The safe answer is none. However you might be able to get away with a very low contamination ratio. That being said, we always highly recommend draining anything over a 5% contamination ratio asap.

I know about petrol in diesel, but what about Super Unleaded?


Putting Super Unleaded, or Shell V-Power, BP Ultimate Unleaded, etc, will have the exact same effect as putting regular unleaded petrol in your diesel car and will need to be drained out and flushed.

Will getting you to do a fuel drain void my warranty?


No! The EU Block Exemption Regulations clearly state that "the work can be carried out by as long as that garage uses manufacturer approved parts and correctly follows the manufacturer's service schedule."

Can I top it up with Petrol and add some 2-stroke oil?


This might work on some vehicles in some cases, but in the majority on instances it won't and you risk damaging the Lambda sensors as well as fuel pump and injectors, just as a regular misfuel.

Get in Touch

In case you have any queries or want help please Call us!
We are able to get you on the road once again.

24 hour Mini Helpline

0333 366 0103

Our Business Office

Fuel Fixer Ltd, Linx House, 147 London Road, East Grinstead, RH19 1ET

Weekdays: 9am to 5pm

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